/**
 * @preserve HTML5 Shiv 3.7.3 | @afarkas @jdalton @jon_neal @rem | MIT/GPL2 Licensed
 */
;(function (window, document) {
    /*jshint evil:true */
    /** version */
    var version = '3.7.3';

    /** Preset options */
    var options = window.html5 || {};

    /** Used to skip problem elements */
    var reSkip = /^<|^(?:button|map|select|textarea|object|iframe|option|optgroup)$/i;

    /** Not all elements can be cloned in IE **/
    var saveClones = /^(?:a|b|code|div|fieldset|h1|h2|h3|h4|h5|h6|i|label|li|ol|p|q|span|strong|style|table|tbody|td|th|tr|ul)$/i;

    /** Detect whether the browser supports default html5 styles */
    var supportsHtml5Styles;

    /** Name of the expando, to work with multiple documents or to re-shiv one document */
    var expando = '_html5shiv';

    /** The id for the the documents expando */
    var expanID = 0;

    /** Cached data for each document */
    var expandoData = {};

    /** Detect whether the browser supports unknown elements */
    var supportsUnknownElements;

    (function () {
        try {
            var a = document.createElement('a');
            a.innerHTML = '<xyz></xyz>';
            //if the hidden property is implemented we can assume, that the browser supports basic HTML5 Styles
            supportsHtml5Styles = ('hidden' in a);

            supportsUnknownElements = a.childNodes.length == 1 || (function () {
                    // assign a false positive if unable to shiv
                    (document.createElement)('a');
                    var frag = document.createDocumentFragment();
                    return (
                        typeof frag.cloneNode == 'undefined' ||
                        typeof frag.createDocumentFragment == 'undefined' ||
                        typeof frag.createElement == 'undefined'
                    );
                }());
        } catch (e) {
            // assign a false positive if detection fails => unable to shiv
            supportsHtml5Styles = true;
            supportsUnknownElements = true;
        }

    }());

    /*--------------------------------------------------------------------------*/

    /**
     * Creates a style sheet with the given CSS text and adds it to the document.
     * @private
     * @param {Document} ownerDocument The document.
     * @param {String} cssText The CSS text.
     * @returns {StyleSheet} The style element.
     */
    function addStyleSheet(ownerDocument, cssText) {
        var p = ownerDocument.createElement('p'),
            parent = ownerDocument.getElementsByTagName('head')[0] || ownerDocument.documentElement;

        p.innerHTML = 'x<style>' + cssText + '</style>';
        return parent.insertBefore(p.lastChild, parent.firstChild);
    }

    /**
     * Returns the value of `html5.elements` as an array.
     * @private
     * @returns {Array} An array of shived element node names.
     */
    function getElements() {
        var elements = html5.elements;
        return typeof elements == 'string' ? elements.split(' ') : elements;
    }

    /**
     * Extends the built-in list of html5 elements
     * @memberOf html5
     * @param {String|Array} newElements whitespace separated list or array of new element names to shiv
     * @param {Document} ownerDocument The context document.
     */
    function addElements(newElements, ownerDocument) {
        var elements = html5.elements;
        if (typeof elements != 'string') {
            elements = elements.join(' ');
        }
        if (typeof newElements != 'string') {
            newElements = newElements.join(' ');
        }
        html5.elements = elements + ' ' + newElements;
        shivDocument(ownerDocument);
    }

    /**
     * Returns the data associated to the given document
     * @private
     * @param {Document} ownerDocument The document.
     * @returns {Object} An object of data.
     */
    function getExpandoData(ownerDocument) {
        var data = expandoData[ownerDocument[expando]];
        if (!data) {
            data = {};
            expanID++;
            ownerDocument[expando] = expanID;
            expandoData[expanID] = data;
        }
        return data;
    }

    /**
     * returns a shived element for the given nodeName and document
     * @memberOf html5
     * @param {String} nodeName name of the element
     * @param {Document} ownerDocument The context document.
     * @returns {Object} The shived element.
     */
    function createElement(nodeName, ownerDocument, data) {
        if (!ownerDocument) {
            ownerDocument = document;
        }
        if (supportsUnknownElements) {
            return ownerDocument.createElement(nodeName);
        }
        if (!data) {
            data = getExpandoData(ownerDocument);
        }
        var node;

        if (data.cache[nodeName]) {
            node = data.cache[nodeName].cloneNode();
        } else if (saveClones.test(nodeName)) {
            node = (data.cache[nodeName] = data.createElem(nodeName)).cloneNode();
        } else {
            node = data.createElem(nodeName);
        }

        // Avoid adding some elements to fragments in IE < 9 because
        // * Attributes like `name` or `type` cannot be set/changed once an element
        //   is inserted into a document/fragment
        // * Link elements with `src` attributes that are inaccessible, as with
        //   a 403 response, will cause the tab/window to crash
        // * Script elements appended to fragments will execute when their `src`
        //   or `text` property is set
        return node.canHaveChildren && !reSkip.test(nodeName) && !node.tagUrn ? data.frag.appendChild(node) : node;
    }

    /**
     * returns a shived DocumentFragment for the given document
     * @memberOf html5
     * @param {Document} ownerDocument The context document.
     * @returns {Object} The shived DocumentFragment.
     */
    function createDocumentFragment(ownerDocument, data) {
        if (!ownerDocument) {
            ownerDocument = document;
        }
        if (supportsUnknownElements) {
            return ownerDocument.createDocumentFragment();
        }
        data = data || getExpandoData(ownerDocument);
        var clone = data.frag.cloneNode(),
            i = 0,
            elems = getElements(),
            l = elems.length;
        for (; i < l; i++) {
            clone.createElement(elems[i]);
        }
        return clone;
    }

    /**
     * Shivs the `createElement` and `createDocumentFragment` methods of the document.
     * @private
     * @param {Document|DocumentFragment} ownerDocument The document.
     * @param {Object} data of the document.
     */
    function shivMethods(ownerDocument, data) {
        if (!data.cache) {
            data.cache = {};
            data.createElem = ownerDocument.createElement;
            data.createFrag = ownerDocument.createDocumentFragment;
            data.frag = data.createFrag();
        }


        ownerDocument.createElement = function (nodeName) {
            //abort shiv
            if (!html5.shivMethods) {
                return data.createElem(nodeName);
            }
            return createElement(nodeName, ownerDocument, data);
        };

        ownerDocument.createDocumentFragment = Function('h,f', 'return function(){' +
            'var n=f.cloneNode(),c=n.createElement;' +
            'h.shivMethods&&(' +
                // unroll the `createElement` calls
            getElements().join().replace(/[\w\-:]+/g, function (nodeName) {
                data.createElem(nodeName);
                data.frag.createElement(nodeName);
                return 'c("' + nodeName + '")';
            }) +
            ');return n}'
        )(html5, data.frag);
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Shivs the given document.
     * @memberOf html5
     * @param {Document} ownerDocument The document to shiv.
     * @returns {Document} The shived document.
     */
    function shivDocument(ownerDocument) {
        if (!ownerDocument) {
            ownerDocument = document;
        }
        var data = getExpandoData(ownerDocument);

        if (html5.shivCSS && !supportsHtml5Styles && !data.hasCSS) {
            data.hasCSS = !!addStyleSheet(ownerDocument,
                // corrects block display not defined in IE6/7/8/9
                'article,aside,dialog,figcaption,figure,footer,header,hgroup,main,nav,section{display:block}' +
                    // adds styling not present in IE6/7/8/9
                'mark{background:#FF0;color:#000}' +
                    // hides non-rendered elements
                'template{display:none}'
            );
        }
        if (!supportsUnknownElements) {
            shivMethods(ownerDocument, data);
        }
        return ownerDocument;
    }

    /*--------------------------------------------------------------------------*/

    /**
     * The `html5` object is exposed so that more elements can be shived and
     * existing shiving can be detected on iframes.
     * @type Object
     * @example
     *
     * // options can be changed before the script is included
     * html5 = { 'elements': 'mark section', 'shivCSS': false, 'shivMethods': false };
     */
    var html5 = {

        /**
         * An array or space separated string of node names of the elements to shiv.
         * @memberOf html5
         * @type Array|String
         */
        'elements': options.elements || 'abbr article aside audio bdi canvas data datalist details dialog figcaption figure footer header hgroup main mark meter nav output picture progress section summary template time video',

        /**
         * current version of html5shiv
         */
        'version': version,

        /**
         * A flag to indicate that the HTML5 style sheet should be inserted.
         * @memberOf html5
         * @type Boolean
         */
        'shivCSS': (options.shivCSS !== false),

        /**
         * Is equal to true if a browser supports creating unknown/HTML5 elements
         * @memberOf html5
         * @type boolean
         */
        'supportsUnknownElements': supportsUnknownElements,

        /**
         * A flag to indicate that the document's `createElement` and `createDocumentFragment`
         * methods should be overwritten.
         * @memberOf html5
         * @type Boolean
         */
        'shivMethods': (options.shivMethods !== false),

        /**
         * A string to describe the type of `html5` object ("default" or "default print").
         * @memberOf html5
         * @type String
         */
        'type': 'default',

        // shivs the document according to the specified `html5` object options
        'shivDocument': shivDocument,

        //creates a shived element
        createElement: createElement,

        //creates a shived documentFragment
        createDocumentFragment: createDocumentFragment,

        //extends list of elements
        addElements: addElements
    };

    /*--------------------------------------------------------------------------*/

    // expose html5
    window.html5 = html5;

    // shiv the document
    shivDocument(document);

    /*------------------------------- Print Shiv -------------------------------*/

    /** Used to filter media types */
    var reMedia = /^$|\b(?:all|print)\b/;

    /** Used to namespace printable elements */
    var shivNamespace = 'html5shiv';

    /** Detect whether the browser supports shivable style sheets */
    var supportsShivableSheets = !supportsUnknownElements && (function () {
            // assign a false negative if unable to shiv
            var docEl = document.documentElement;
            return !(
                typeof document.namespaces == 'undefined' ||
                typeof document.parentWindow == 'undefined' ||
                typeof docEl.applyElement == 'undefined' ||
                typeof docEl.removeNode == 'undefined' ||
                typeof window.attachEvent == 'undefined'
            );
        }());

    /*--------------------------------------------------------------------------*/

    /**
     * Wraps all HTML5 elements in the given document with printable elements.
     * (eg. the "header" element is wrapped with the "html5shiv:header" element)
     * @private
     * @param {Document} ownerDocument The document.
     * @returns {Array} An array wrappers added.
     */
    function addWrappers(ownerDocument) {
        var node,
            nodes = ownerDocument.getElementsByTagName('*'),
            index = nodes.length,
            reElements = RegExp('^(?:' + getElements().join('|') + ')$', 'i'),
            result = [];

        while (index--) {
            node = nodes[index];
            if (reElements.test(node.nodeName)) {
                result.push(node.applyElement(createWrapper(node)));
            }
        }
        return result;
    }

    /**
     * Creates a printable wrapper for the given element.
     * @private
     * @param {Element} element The element.
     * @returns {Element} The wrapper.
     */
    function createWrapper(element) {
        var node,
            nodes = element.attributes,
            index = nodes.length,
            wrapper = element.ownerDocument.createElement(shivNamespace + ':' + element.nodeName);

        // copy element attributes to the wrapper
        while (index--) {
            node = nodes[index];
            node.specified && wrapper.setAttribute(node.nodeName, node.nodeValue);
        }
        // copy element styles to the wrapper
        wrapper.style.cssText = element.style.cssText;
        return wrapper;
    }

    /**
     * Shivs the given CSS text.
     * (eg. header{} becomes html5shiv\:header{})
     * @private
     * @param {String} cssText The CSS text to shiv.
     * @returns {String} The shived CSS text.
     */
    function shivCssText(cssText) {
        var pair,
            parts = cssText.split('{'),
            index = parts.length,
            reElements = RegExp('(^|[\\s,>+~])(' + getElements().join('|') + ')(?=[[\\s,>+~#.:]|$)', 'gi'),
            replacement = '$1' + shivNamespace + '\\:$2';

        while (index--) {
            pair = parts[index] = parts[index].split('}');
            pair[pair.length - 1] = pair[pair.length - 1].replace(reElements, replacement);
            parts[index] = pair.join('}');
        }
        return parts.join('{');
    }

    /**
     * Removes the given wrappers, leaving the original elements.
     * @private
     * @params {Array} wrappers An array of printable wrappers.
     */
    function removeWrappers(wrappers) {
        var index = wrappers.length;
        while (index--) {
            wrappers[index].removeNode();
        }
    }

    /*--------------------------------------------------------------------------*/

    /**
     * Shivs the given document for print.
     * @memberOf html5
     * @param {Document} ownerDocument The document to shiv.
     * @returns {Document} The shived document.
     */
    function shivPrint(ownerDocument) {
        var shivedSheet,
            wrappers,
            data = getExpandoData(ownerDocument),
            namespaces = ownerDocument.namespaces,
            ownerWindow = ownerDocument.parentWindow;

        if (!supportsShivableSheets || ownerDocument.printShived) {
            return ownerDocument;
        }
        if (typeof namespaces[shivNamespace] == 'undefined') {
            namespaces.add(shivNamespace);
        }

        function removeSheet() {
            clearTimeout(data._removeSheetTimer);
            if (shivedSheet) {
                shivedSheet.removeNode(true);
            }
            shivedSheet = null;
        }

        ownerWindow.attachEvent('onbeforeprint', function () {

            removeSheet();

            var imports,
                length,
                sheet,
                collection = ownerDocument.styleSheets,
                cssText = [],
                index = collection.length,
                sheets = Array(index);

            // convert styleSheets collection to an array
            while (index--) {
                sheets[index] = collection[index];
            }
            // concat all style sheet CSS text
            while ((sheet = sheets.pop())) {
                // IE does not enforce a same origin policy for external style sheets...
                // but has trouble with some dynamically created stylesheets
                if (!sheet.disabled && reMedia.test(sheet.media)) {

                    try {
                        imports = sheet.imports;
                        length = imports.length;
                    } catch (er) {
                        length = 0;
                    }

                    for (index = 0; index < length; index++) {
                        sheets.push(imports[index]);
                    }

                    try {
                        cssText.push(sheet.cssText);
                    } catch (er) {
                    }
                }
            }

            // wrap all HTML5 elements with printable elements and add the shived style sheet
            cssText = shivCssText(cssText.reverse().join(''));
            wrappers = addWrappers(ownerDocument);
            shivedSheet = addStyleSheet(ownerDocument, cssText);

        });

        ownerWindow.attachEvent('onafterprint', function () {
            // remove wrappers, leaving the original elements, and remove the shived style sheet
            removeWrappers(wrappers);
            clearTimeout(data._removeSheetTimer);
            data._removeSheetTimer = setTimeout(removeSheet, 500);
        });

        ownerDocument.printShived = true;
        return ownerDocument;
    }

    /*--------------------------------------------------------------------------*/

    // expose API
    html5.type += ' print';
    html5.shivPrint = shivPrint;

    // shiv for print
    shivPrint(document);

    if (typeof module == 'object' && module.exports) {
        module.exports = html5;
    }

}(typeof window !== "undefined" ? window : this, document));
